if (document.images)
{
     Button1on= new Image(171,25);
     Button1on.src="img/firmengeschichte_2.gif";

     Button1off = new Image(171,2);
     Button1off.src="img/Firmengeschichte.gif";

     Button2on= new Image(171,25);
     Button2on.src="img/unseremarken_2.gif";

     Button2off = new Image(171,2);
     Button2off.src="img/unseremarken.gif";

     Button3on= new Image(171,25);
     Button3on.src="img/ortopaedie_2.gif";

     Button3off = new Image(171,2);
     Button3off.src="img/ortopaedie.gif";

     Button4on= new Image(171,25);
     Button4on.src="img/sportbereich_2.gif";

     Button4off = new Image(171,2);
     Button4off.src="img/sportbereich.gif";

     Button5on= new Image(171,25);
     Button5on.src="img/impressum_2.gif";

     Button5off = new Image(171,2);
     Button5off.src="img/impressum.gif";

     Button6on= new Image(171,25);
     Button6on.src="img/kontakt_2.gif";

     Button6off = new Image(171,2);
     Button6off.src="img/kontakt.gif";

     Button7on= new Image(171,25);
     Button7on.src="img/startseite_2.gif";

     Button7off = new Image(171,2);
     Button7off.src="img/startseite.gif";

	 Button8on= new Image(171,25);
     Button8on.src="img/druckpunkt_2.gif";

     Button8off = new Image(171,2);
     Button8off.src="img/druckpunkt.gif";
	 
	 Button9on= new Image(171,25);
     Button9on.src="img/schuhfachgeschaeft_2.gif";

     Button9off = new Image(171,2);
     Button9off.src="img/schuhfachgeschaeft.gif";
}

function lightup(imgName)
{
   if (document.images)
    {
      imgOn=eval(imgName + "on.src");
      document[imgName].src= imgOn;
    }
}

function turnoff(imgName)
{
   if (document.images)
    {
      imgOff=eval(imgName + "off.src");
      document[imgName].src= imgOff;
    }
}